I was having problems with my air conditioner and at a shop it was diagnosed with an AC Control Head problem. The AC would not blow at all. Since then the truck has had a new Control Head, AC Relay, and Blower Motor Controller/Resistor. Found out the problem was the Blower Motor. Now the AC will blow one speed, will not change from the front vents to floor or defrost and will not turn off unless I turn the truck off. The truck is an 08 F-250 6.4 PSD CC SB. Dual climate control AC with heated seats. Please help.

This is really a tough one (for me at least). When you have the dual climate controls and the electronic servos that control the blend doors it can be a huge problem to find the issues with this. Something I've done in the past with a vehicle that was equipped with a similar system was disconnect the battery for about 30 minutes. This caused the electronics with the ac system to "reset" and it helps ou my problem at the time. The problem for me was the passenger side would only blow out hot air when the ac was on. After the reset it went back to working normal. Who knows this might help you but I really don't know.
I would your only other option is take it to another shop.

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